Inside a secret $150 million megamansion

It’s one of the most exclusive homes in America, and also one of the most impressive. The fortress like entrance to this megahome only helps build anticipation for what lies beyond the front security gates.

CNBC cameras were granted exclusive access to tour this luxury compound, but for privacy and security reasons, we can’t reveal the owner or the exact location in Los Angeles.

What we can tell you, will blow your mind. It's a 42,000 square-foot home that includes five buildings, 28 bedrooms, 36 bathrooms and one pretty amazing infinity pool with panoramic views of Los Angeles. And you probably don't ever need to worry about finding a parking spot in the home's 24-car-garage.

The designer of the house, Sue Firestone, told CNBC that the owner spared no expense.

"This bathroom alone, I don't even want to guess how many millions of dollars just this bathroom cost," said Firestone. One of the bedrooms has a one-of-a-kind carpet with its own copyright so no one else can replicate the design.

A representative of the owner tells CNBC the home is used once or twice a year, and while it is not officially for sale, the mysterious owner recently declined an offer of $150 million.